Recuperator



C. M. STEIN.

RECUPERATOR.

APPLICATION FILED AUG.19, 1921.

Patented Jan. 24, 1922.

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RECU'PERATOR.

To all whom it may concern:

Be it known that 1, CHARLES M. STEIN, a citizen of France, residing at. Paris, France, have invented a certain new and useful lie-- cuperator, of which the following is a specification.

The invention has for an object to provide a recuperator for preheatin the air or other gases used in connection wlth metallurgical furnaces or the like wherein the joints between the air and waste gas passages will be effective to prevent leakage therebetween.

Another object of the invention is to construct the recuperator in such manner that the partitions between different conduits thereof will be sustained adequately from displacement from proper position.

Another object is to provide a recuper ator, the blocks or tiles of which will be symmetrical, whereby the same will interfit properly at either end with adjacent structural elements.

Further objects and advantages of the invention will be in part obvious and in part specifically pointed out in the description hereinafter contained which, taken in connection with the accompanying drawings discloses a preferred embodiment of the invention; such embodiment, however, is to be considered merely as illustrative of its principle. In the drawings:

Fig. 1 is a perspective view of a recuperator stnucture made in accordance with the invention.

Fig. 2 is a side view partly in section showing a joint between two recuperator blocks or tiles and certain plates associated therewith.

Fig. 3 is a plan view of a recuperator shown in detail.

Referring to the drawings, the recuperato-r stnucture as a whole is shown as resting upon a plurality of piers 1 spaced apart to provide passages for the incoming air or gas to be heated, a base 2 overlying the piers, and being provided with a plurality of openings 3 through which the incoming air or gas passes to the recupeijator. in general, the recuperator comprises a plurality of blocks or tiles 4', built up into spaced vertical courses or columns 5, the tiles of each column having aliued vertical air passages 6, whereby the gas entering the passages 1mderneath the recuperator is afiorded a substantially unimpeded vertical flow through S pecification of Letters Patent. jpm mm ga, 11922,

Application filed August 19, 1921.

Serial No. 493,597.

the several columiis of tiles 5. The columns 5 are spaced apart as shown, and a plurality of substantially horizontal plates 7 extend between adjacent columns at intervals, thus providing horizontal conduits 8 to receive the waste.- gases passing through the recuperator.

As shown in Fig. 1 by the double pointed arrows, the waste gas may be considered as passing through the two upper sets of conduits 8 from right to left, and reversing in direction to pass through two lower sets of conduits 8 frfom left to right.

In recuperators of the above character, it is important that the joints between the tiles be effectively sealed against leakage between the air passages; 6 and the waste gas conduits 8, and the recuperator should be so constructed as to avoid possible shifting of its parts due, for example, to settling of the foundations, or cleaning of the recuperaton flues.

According to the present invention, the horizontal joints 9 between adjacent layers of tiles are sealed by means of parts having engaging surfaces directed substantially at right angles to each other. As shown in Fig. 2, the tile immediately above a given joint 9 is provided with a pair of shoulders 10 on opposite sides thereof, and slightly spaced from the lower end face of the tile in such manner that one of [the horizontal plates 7 may be inserted in the angle formed beneath each shoulder 10. Thus the leakage path from one of the vertical air passages 6 to an adjacent exhaust gas conduit 8 will include the joint 9, and a joint 11 at right angles thereto formed by the engageanent of the side of plate 7 with the side of the tile; also a further horizontal joint 12 at right angles to the joint 11 and of plate 7 which includes the joint 9, the

' either end of the adjoining tile.

joint 14, similar to joint 11 previously described, and a further joint 15 at right angles thereto similar to joint 12 previously described. Thus the engagement between shoulders 10 and 13 and the plates 7 is constructed so as to avoid leakage either above or below the plates. I

Furthermore, the plates 7 are securely clamped in position between the shoulders 10 and 13, the weight of the structure above each shoulder 10 bearing-down upon the latter and against the upper surfaces of the plates.

In the operation of recuperators of the above type it is oftentimes necessary to clean out dust, .slag or the like from the waste gas conduits 8, in which operation the insertion of a pole or the like into the con-.

duits tends to lift up the plates 7 unless they are securely held in place; but it is found that the clamping of the plates, so to speak, between shoulders 10 and 13 secures the same against displacement; Also in case the foundations of the recuperator settle, the shoulders 10 and 13 hold the plates adequately against shifting in such manner as to loosen up the joints.

- It will be noted that tiles of the above character are similarly constructed at each end, that is to say each tile is symmetrical, with the result that either end thereof will co-operate properly with the plates 7 and This is of advantage in facilitating the building of a recuperator.

I claim: 1. A recuperator made up of tiles having substantially unrestricted vertical air passages therein, the tiles being built into parallel spaced columns, substantially horizontal plates extending between adjacent columns to provide waste gas conduits therebetween, means being provided on the tiles respectively above and beneath the plates to retain the latter against both upward and downward movement.

2. A recuperator made up of tiles having substantially unrestricted vertical air passages therein, the tiles being built into parallel spaced columns, substantially horizontal plates extending between adjacent columns to provide waste gas conduits therebetween,

said plates being located at the horizontal joints between the tiles, and the tiles above and beneath the plates being provided respectively with shoulders engaging the upper and lower surfaces of the plates to clamp the plates between the shoulders.

8. A recuperator made up of tiles having substantially unrestricted vertical air passages therein, the tiles being built into parallel spaced columns, substantially horizontal lates extending between adjacent columns to provide waste gas conduits therebetween, the sides of the plates engaging the sides of the tiles, and overlapping the horizontal joints between the successive layers of tiles, the tiles above said plates being provided with shoulders engaging the upper surfaces of the plates to provide a leakage path, including engaging surfaces between the tiles and plates substantially at right angles to each other.

4:. A recuperator made up of tiles having substantially vertical air passages therein, the tiles being built into parallel spaced columns, substantially horizontal plates extending between adjacent columns to provide waste gas conduits therebetween, the sides of the tiles engaging the sides of the plates, and overlapping the horizontal joints between the successive layers of tiles, the tiles above said plates being provided with shoulders engaging the upper surfaces of the plates to provide'a leakage path, including engaging surfaces between the tiles and plates substantially at right angles to each other, the tiles beneath the respective plates being provided with shoulders at the upper surfaces adapted to receive the lower sides of the plates to provide a similar leakage path between plates and the tiles therebeneath, whereby the plates are clamped between said shoulders.

5. A recuperator tile having vertical air passages therein, said tile being provided with shoulders on opposite sides thereof,

said shoulders being located respectively adj acent the top' and bottom end faces of the tile.

In testimony that I claim the foregoing, I have hereunto set my hand this 12 day of July, 1921. I

CHARLES M. STEIN. 

